import { cleanText } from "../core.ts";
import { gen } from "./brain.ts";
import { DEBUG } from "./config.ts";
import { changed, petEngine } from "./engine.ts";
import { brain, emit, store, ui } from "./store.ts";
import { canRunLocally } from "./hosting.ts";

// Pages are written by the pet, never on request: today's at bedtime, and
// missed days one at a time, oldest first, when the brain is free and the
// owner has left it alone for 30 s. The engine chooses when (see pump()); a
// page with unsafe text is dropped and its day stays pending.
export async function writeDiary(date?: string, rewrite = false) {
  if (!canRunLocally() || brain.state !== "ready" || brain.busy || !store.state.pet) return false;
  const execution = store.executionRevision;
  const e = petEngine();
  const turn = e.diaryTurn(date || store.state.today.date, Date.now(), DEBUG && rewrite);
  if (!turn) return false;
  brain.busy = true;
  ui.diaryWriting = true;
  ui.diaryDraft = "dear diary,";
  emit();
  try {
    const r = await gen(turn.request(), (t) => {
      ui.diaryDraft = cleanText("dear diary," + t);
      emit();
    });
    if (execution !== store.executionRevision || !canRunLocally() || !store.tabOwned) return false;
    if (!e.commitDiary(turn, r.text)) console.warn("diary page filtered; the day stays pending");
    changed();
  } catch (err) {
    console.warn(err);
  } finally {
    turn.free();
    if (execution === store.executionRevision) brain.busy = false;
    ui.diaryWriting = false;
    emit();
  }
  return true;
}